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Top Consulting Firms in Belfast (39)

Nisos
Artificial Intelligence • Security • Business Intelligence • Consulting • Cybersecurity
2 Offices
70 Employees
109 Benefits Hiring Now
Unmask adversaries. Protect against human risk and digital threats.

Nisos is a human risk intelligence and managed investigations company that protects organizations and their people from human-driven and digital threats by operating as an extension of their security, intelligence, and legal teams. It leverages a team of expert analysts, specialized in open-source intelligence and adversary tradecraft, to provide actionable intelligence that addresses complex risks like executive threats, insider fraud,...

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Nisos

Nisos's Top Stability & Growth Strengths

Investor Backing & Capital Strength: Investor participation in a 2025 Series C round indicates ongoing access to growth capital, reinforcing confidence in the company’s trajectory. Funding activity appears alongside continued platform development and market engagement.

Product Line Growth: The launch of the Ascend platform in 2025 and subsequent modules for insider threat intelligence and identity integrity point to a widening platform-plus-services portfolio. This progression suggests movement beyond services-led investigations into more scalable offerings.

Strong Revenue Growth: Company communications from 2023 describe significant increases in monthly and subscription revenue along with very strong net revenue retention. These historical signals indicate commercial momentum, even as more recent financial results are not independently verified.

QBE LLC
Information Technology • Professional Services • Consulting • Defense
50 Offices
66 Employees

QBE LLC is a management and technology consulting organization that provides services to the federal government and defense communities, offering IT services, cybersecurity, cloud infrastructure, data management, and system engineering.

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QBE LLC
Ernst & Young
Professional Services • Consulting
32 Offices
350,000 Employees
44 Benefits

EY exists to build a better working world, helping create long-term value for clients, people and society and build trust in the capital markets. Enabled by data and technology, diverse EY teams in over 150 countries provide trust through assurance and help clients grow, transform and operate. Working across assurance, consulting, law, strategy, tax and transactions, EY teams ask better questions to...

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Ernst & Young
Eliassen Group
Professional Services • Consulting
26 Offices
1,152 Employees
18 Benefits

Eliassen Group is a leading strategic consulting company that provides business, clinical, and IT services for our clients as they seek to transform and execute strategies that will drive exceptional outcomes. Leveraging over 30 years of success, we focus on clinical solutions, professional services, and talent solutions. Eliassen Group positively impacts the lives of our employees, clients, consultants, and the...

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Eliassen Group

Eliassen Group's Top Stability & Growth Strengths

Market Expansion: Acquisitions such as VIA Technical, SafeNet Consulting, and The Evanston Group broaden geographic reach and deepen technology and life sciences capabilities. Maintaining a national office footprint and adding presence in key regions signal deliberate growth in addressable markets.

Strong Brand Reputation: Industry accolades like repeated U.S. Best Managed Company honors and ClearlyRated Best of Staffing Diamond awards highlight sustained external validation of quality and performance. Recognition by sector publications and lists reinforces credibility within staffing and consulting niches.

Future-Ready Strategy: Emphasis on digital transformation, AI data services, cybersecurity, and cloud infrastructure points to proactive positioning for evolving client needs. Partnerships and platform integrations, including operational systems consolidation, are positioned to support scale and innovation.

Catagen
Greentech • Consulting
2 Offices
54 Employees

CATAGEN’s mission is to clean and decarbonise the air. We are a pioneering green emissions testing facility based in Belfast providing unrivalled metrics to optimise catalyst development and reduce harmful tailpipe emissions. Our expertise in the mobility sector and global emissions standards has led us to develop ClimaHtech technologies including Green Hydrogen. Our Core Business provides GREEN emissions testing to global...

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Catagen
SciLeads
Information Technology • Marketing Tech • Sales • Consulting
2 Offices
79 Employees
Hiring Now

SciLeads is an innovative sales and marketing intelligence platform for scientific companies. We enable greater sales by providing companies with instant access to highly relevant prospect and market information.

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SciLeads
CI&T
Information Technology • Consulting
22 Offices
6,474 Employees
28 Benefits

CI&T is your end-to-end digital transformation partner. As a digital native, we bring a 27-year track record of accelerating business impact through complete and scalable digital solutions. With a global presence of 6,000+ professionals in strategy, research, data science, design and engineering, we unlock top-line growth, improve customer experience and drive operational efficiency.

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CI&T
Visiativ
Information Technology • Professional Services • Software • Consulting
27 Offices
1,600 Employees
Hiring Now

Visiativ is a French technology and consulting group that helps businesses—particularly small and mid-sized companies—plan, implement, manage and monitor digital transformation and innovation. It delivers digital solutions and services spanning 3D CAD/product development, product lifecycle management, business-process automation and enterprise systems, while providing assessment, implementation, training and ongoing support to improve competitiveness, productivity, collaboration and business performance worldwide.

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Visiativ
Peninsula Canada
HR Tech • Business Intelligence • Consulting
6 Offices
238 Employees
3 Benefits

Peninsula is a worldwide trusted small business advisor. We help small businesses in Canada, the UK, Ireland, Australia, and New Zealand, taking care of the details and leaving you free to see the big picture, all for a fraction of the cost of most professional service providers, thanks to our affordable membership options. When you run a small business, the...

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Peninsula Canada
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Cooper Parry
Professional Services • Consulting • Financial Services
12 Offices
1,200 Employees
Hiring Now

Cooper Parry is a UK accountancy and business-advisory firm serving entrepreneurial businesses, founders, dynamic companies, and high-net-worth individuals across the UK and overseas. Its services span audit, tax, innovation, technology and high-growth support, outsourced finance, corporate finance, deals, wealth management, sustainability advisory, legal, and digital solutions. The firm combines big-firm capability with boutique energy and people-first delivery for the mid-market.

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Cooper Parry
Reply
Information Technology • Consulting
35 Offices
4,171 Employees
11 Benefits

Reply [EXM, STAR: REY] specialises in the design and implementation of solutions based on new communication channels and digital media. As a network of highly specialised companies, Reply defines and develops business models enabled by the new models of AI, big data, cloud computing, digital media and the internet of things. Reply delivers consulting, system integration and digital services to...

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Reply
Crossvale
Information Technology • Consulting
2 Offices
68 Employees
13 Benefits

We are an IT services company that provides solutions to companies of every size - from small companies to some of the largest global enterprises. Our specialties are: - Digital Transformation - Enterprise Architecture - RedHat OpenShift (PaaS) - RedHat OpenStack (IaaS) - Business Process Management - Service Oriented Architecture (SOA) - Integration - Cloud, Hybrid and On-Prem solutions - MEAN Stack (Mongo, Express, Angular Node) We have operations in USA,...

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Crossvale
Heidrick & Struggles
HR Tech • Consulting
14 Offices
2,093 Employees
26 Benefits

We Help Our Clients Change The World, One Leadership Team At A Time®. Heidrick & Struggles International, Inc., (Nasdaq:HSII) serves the executive talent and leadership needs of the world's top organizations as the premier provider of leadership consulting, culture shaping and senior-level executive search services. Heidrick & Struggles pioneered the profession of executive search more than 60 years ago. Today, the...

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Heidrick & Struggles

Heidrick & Struggles's Top Stability & Growth Strengths

Strong Revenue Growth: Company disclosures indicate steady year-over-year growth in 2024 and accelerating gains through the first three quarters of 2025. Management cited broad-based momentum across Executive Search, On‑Demand Talent, and Consulting.

Diversified Revenue Streams: The business has expanded beyond executive search into leadership consulting and on‑demand/interim talent, with each line contributing to recent growth. This mix supports capacity to serve end‑to‑end leadership needs and reduces reliance on a single offering.

Strong Market Position & Advantage: Independent rankings and industry references consistently place the firm in the top tier alongside other global leaders. Thought leadership and recurring inclusion in major lists reinforce access to high‑stakes board and C‑suite mandates.

Version 1
Information Technology • Consulting
12 Offices
3,000 Employees
12 Benefits Hiring Now

Version 1 proves that IT can make a real difference to our customers'​ businesses. We are trusted by global brands to deliver IT services and solutions which drive customer success. Our 3000+ strong team works closely with our technology partners to provide independent advice that helps our customers navigate the rapidly changing world of IT. Our greatest strength is balance...

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Version 1
PA Consulting
Consulting
21 Offices
5,289 Employees
8 Benefits Hiring Now

We believe in the power of ingenuity to build a positive human future. As strategies, technologies, and innovation collide, we create opportunity from complexity. Our diverse teams of experts combine innovative thinking and breakthrough technologies to progress further, faster. Our clients adapt and transform, and together we achieve enduring results. We are over 4,000 strategists, innovators, designers, consultants, digital...

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PA Consulting
Tata Technologies
Information Technology • Consulting
13 Offices
15,050 Employees
10 Benefits

We're a global product engineering and digital services company focused on fulfilling our mission of helping the world drive, fly, build, and farm by enabling our customers to realize better products and deliver better experiences. We’re the strategic engineering partner businesses turn to when they aspire to be better. Manufacturing companies rely on us to enable them to conceptualize, develop...

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Tata Technologies
Wavteq
Marketing Tech • Consulting
5 Offices
36 Employees

Wavteq Group Limited is a global lead generation and digital marketing company providing results-driven trade and investment services to economic development organizations. In 2023, Wavteq completed the successful sale of its products and consulting assets to the Financial Times Group Limited enabling the company to focus on global expansion of its core trade and investment services. Since 2022, Wavteq has...

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Wavteq
Phastar
Biotech • Consulting
3 Offices
399 Employees

Phastar is a specialist biometrics contract research organization offering statistical consulting, clinical trial reporting, data management and data science services by providing expert consultants and managing and delivering in-house projects, FSP-style arrangements and preferred partnerships. Our number one priority is ensuring on time, quality work: every project undertaken is supervised on methodology and utilizes internal processes designed to guarantee optimal...

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Phastar
Luxoft
Information Technology • Software • Consulting
27 Offices
15,405 Employees
16 Benefits

Luxoft, a DXC Technology Company (NYSE: DXC), is a digital strategy and software engineering firm providing bespoke technology solutions that drive business change for customers the world over. Acquired by U.S. company DXC Technology in 2019, Luxoft is a global operation in 44 cities and 21 countries with an international, agile workforce of nearly 18,000 people. It combines a unique...

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Luxoft
B-Secur
Information Technology • Consulting
Belfast
76 Employees

B-Secur is a heart health technology company. Founded in Belfast, Northern Ireland, we are on a mission to save and improve millions of lives each year by advancing heart health technology that brings greater clarity to EKG interpretation with better data and deeper insights. We spent many years immersed in deep scientific research in EKG biometric security. This led us...

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B-Secur

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